Bike hacks
It is possible to narrow an 8-speed freehub to 128mm OLD w/o putting an insane (or any more insane than it would have been with a 7-speed freehub) dish onto the wheel, but at the cost of very tight clearance between the small cog & the dropout. And this will keep my wheels portable between the kit bike, the mountainhack, and the (aluminum and thus not possible to safely respace) born-again Trek.